1 September 1974 Microchannel-Plate Concave-Grating Spectrometers
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Abstract
Two spectrometers of the concave-grating (Rowland circle) type, uti-lizing an entrance slit and a micro-channel plate at the focal surface, have been developed. Our primary application at present is to terrestrial and planetary airglow and auroral studies in the far ultraviolet (300-1800 A). The first spectrometer utilizes electronographic recording of the spectral image, with magnetic focusing of the electron output of the micro-channel plate onto electron-sensitive film. A microchannel plate gain of 10 to 100 is used. Resolution is limited only by the channel size of available microchannel plates. The second spectrometer utilizes a two-stage microchannel plate, operating at gains of up to 107, with the output bursts incident on a resistive (106 ohm) strip placed immediately behind the plate. The ratio of the pulse sizes sensed at opposite ends of the strip is used to determine the position along the strip at which it occurred (and hence the corresponding wavelength along the Rowland circle).
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George R. Carruthers, George R. Carruthers, Chet B. Opal, Chet B. Opal, } "Microchannel-Plate Concave-Grating Spectrometers", Proc. SPIE 0044, Instrumentation in Astronomy II, (1 September 1974); doi: 10.1117/12.953935; https://doi.org/10.1117/12.953935
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